Even without starting any RDP sessions, I get a pile of TermDD code 50 errors in my server event log.
Only 2 machines in the domain/network, and only 1 user (me!):
#1 Desktop is Windows 8 Pro with Media Center (64 bit), fully up to date on patches.
C:\windows\system32\mstsc.exe Version 6.2.9200.16465
C:\windows\system32\mstscax.dll Version 6.2.9200.16465
C:\windows\system32\en-US\mstsc.exe.mui Version ?
C:\windows\system32\en-US\mstscax.dll.mui Version ?
#2 Server is Windows Server 2008 R2 SP1 (64 bit), fully up to date on patches, mostly with default high security configurations.
C:\windows\system32\mstsc.exe Version 6.2.9200.16398
C:\windows\system32\mstscax.dll Version 6.2.9200.16398
C:\windows\system32\en-US\mstsc.exe.mui Version ?
C:\windows\system32\en-US\mstscax.dll.mui Version ?
On the desktop, the default RDP connection settings I use include:
Display - 1280x800, 24 bit colour
Experience - detect connection quality automatically, persistent bitmap caching, reconnect if dropped
In the last week there have been 114 TermDD code 50 event log records and I have NOT ONCE in that week used RDP to logon to the server from the desktop. Seems to be about 9 each day, not in any apparent rhythm or pattern versus time.
Any ideas 1) what causes the connection to occur and 2) why it gets this protocol error and 3) what I should do about it? The current thread (and others I have searched for) contain lots of ideas, but no solutions that seem to apply to my situation.